Merge branch 'tracing/ftrace'; commit 'v2.6.29-rc2' into tracing/core

17 files changed, 181 insertions, 101 deletions

diff --git a/mm/fadvise.c b/mm/fadvise.c
index a1da969..54a0f80 100644
--- a/mm/fadvise.c
+++ b/mm/fadvise.c
@@ -24,7 +24,7 @@
  * POSIX_FADV_WILLNEED could set PG_Referenced, and POSIX_FADV_NOREUSE could
  * deactivate the pages and clear PG_Referenced.
  */
-asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice)
+SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice)
 {
 	struct file *file = fget(fd);
 	struct address_space *mapping;
@@ -126,12 +126,26 @@ out:
 	fput(file);
 	return ret;
 }
+#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
+asmlinkage long SyS_fadvise64_64(long fd, loff_t offset, loff_t len, long advice)
+{
+	return SYSC_fadvise64_64((int) fd, offset, len, (int) advice);
+}
+SYSCALL_ALIAS(sys_fadvise64_64, SyS_fadvise64_64);
+#endif
 
 #ifdef __ARCH_WANT_SYS_FADVISE64
 
-asmlinkage long sys_fadvise64(int fd, loff_t offset, size_t len, int advice)
+SYSCALL_DEFINE(fadvise64)(int fd, loff_t offset, size_t len, int advice)
 {
 	return sys_fadvise64_64(fd, offset, len, advice);
 }
+#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
+asmlinkage long SyS_fadvise64(long fd, loff_t offset, long len, long advice)
+{
+	return SYSC_fadvise64((int) fd, offset, (size_t)len, (int)advice);
+}
+SYSCALL_ALIAS(sys_fadvise64, SyS_fadvise64);
+#endif
 
 #endif
diff --git a/mm/filemap.c b/mm/filemap.c
index ceba0bd..23acefe 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1374,7 +1374,7 @@ do_readahead(struct address_space *mapping, struct file *filp,
 	return 0;
 }
 
-asmlinkage ssize_t sys_readahead(int fd, loff_t offset, size_t count)
+SYSCALL_DEFINE(readahead)(int fd, loff_t offset, size_t count)
 {
 	ssize_t ret;
 	struct file *file;
@@ -1393,6 +1393,13 @@ asmlinkage ssize_t sys_readahead(int fd, loff_t offset, size_t count)
 	}
 	return ret;
 }
+#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
+asmlinkage long SyS_readahead(long fd, loff_t offset, long count)
+{
+	return SYSC_readahead((int) fd, offset, (size_t) count);
+}
+SYSCALL_ALIAS(sys_readahead, SyS_readahead);
+#endif
 
 #ifdef CONFIG_MMU
 /**
diff --git a/mm/fremap.c b/mm/fremap.c
index 62d5bbd..736ba7f 100644
--- a/mm/fremap.c
+++ b/mm/fremap.c
@@ -120,8 +120,8 @@ static int populate_range(struct mm_struct *mm, struct vm_area_struct *vma,
  * and the vma's default protection is used. Arbitrary protections
  * might be implemented in the future.
  */
-asmlinkage long sys_remap_file_pages(unsigned long start, unsigned long size,
-	unsigned long prot, unsigned long pgoff, unsigned long flags)
+SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
+		unsigned long, prot, unsigned long, pgoff, unsigned long, flags)
 {
 	struct mm_struct *mm = current->mm;
 	struct address_space *mapping;
diff --git a/mm/madvise.c b/mm/madvise.c
index f9349c1..b9ce574 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -281,7 +281,7 @@ madvise_vma(struct vm_area_struct *vma, struct vm_area_struct **prev,
  *  -EBADF  - map exists, but area maps something that isn't a file.
  *  -EAGAIN - a kernel resource was temporarily unavailable.
  */
-asmlinkage long sys_madvise(unsigned long start, size_t len_in, int behavior)
+SYSCALL_DEFINE3(madvise, unsigned long, start, size_t, len_in, int, behavior)
 {
 	unsigned long end, tmp;
 	struct vm_area_struct * vma, *prev;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index e2996b8..4d0ea3c 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -358,6 +358,10 @@ void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru)
 		return;
 
 	pc = lookup_page_cgroup(page);
+	/*
+	 * Used bit is set without atomic ops but after smp_wmb().
+	 * For making pc->mem_cgroup visible, insert smp_rmb() here.
+	 */
 	smp_rmb();
 	/* unused page is not rotated. */
 	if (!PageCgroupUsed(pc))
@@ -374,7 +378,10 @@ void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru)
 	if (mem_cgroup_disabled())
 		return;
 	pc = lookup_page_cgroup(page);
-	/* barrier to sync with "charge" */
+	/*
+	 * Used bit is set without atomic ops but after smp_wmb().
+	 * For making pc->mem_cgroup visible, insert smp_rmb() here.
+	 */
 	smp_rmb();
 	if (!PageCgroupUsed(pc))
 		return;
@@ -559,6 +566,14 @@ mem_cgroup_get_reclaim_stat_from_page(struct page *page)
 		return NULL;
 
 	pc = lookup_page_cgroup(page);
+	/*
+	 * Used bit is set without atomic ops but after smp_wmb().
+	 * For making pc->mem_cgroup visible, insert smp_rmb() here.
+	 */
+	smp_rmb();
+	if (!PageCgroupUsed(pc))
+		return NULL;
+
 	mz = page_cgroup_zoneinfo(pc);
 	if (!mz)
 		return NULL;
@@ -618,7 +633,7 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
  * called with hierarchy_mutex held
  */
 static struct mem_cgroup *
-mem_cgroup_get_next_node(struct mem_cgroup *curr, struct mem_cgroup *root_mem)
+__mem_cgroup_get_next_node(struct mem_cgroup *curr, struct mem_cgroup *root_mem)
 {
 	struct cgroup *cgroup, *curr_cgroup, *root_cgroup;
 
@@ -629,19 +644,16 @@ mem_cgroup_get_next_node(struct mem_cgroup *curr, struct mem_cgroup *root_mem)
 		/*
 		 * Walk down to children
 		 */
-		mem_cgroup_put(curr);
 		cgroup = list_entry(curr_cgroup->children.next,
 						struct cgroup, sibling);
 		curr = mem_cgroup_from_cont(cgroup);
-		mem_cgroup_get(curr);
 		goto done;
 	}
 
 visit_parent:
 	if (curr_cgroup == root_cgroup) {
-		mem_cgroup_put(curr);
-		curr = root_mem;
-		mem_cgroup_get(curr);
+		/* caller handles NULL case */
+		curr = NULL;
 		goto done;
 	}
 
@@ -649,11 +661,9 @@ visit_parent:
 	 * Goto next sibling
 	 */
 	if (curr_cgroup->sibling.next != &curr_cgroup->parent->children) {
-		mem_cgroup_put(curr);
 		cgroup = list_entry(curr_cgroup->sibling.next, struct cgroup,
 						sibling);
 		curr = mem_cgroup_from_cont(cgroup);
-		mem_cgroup_get(curr);
 		goto done;
 	}
 
@@ -664,7 +674,6 @@ visit_parent:
 	goto visit_parent;
 
 done:
-	root_mem->last_scanned_child = curr;
 	return curr;
 }
 
@@ -674,40 +683,46 @@ done:
  * that to reclaim free pages from.
  */
 static struct mem_cgroup *
-mem_cgroup_get_first_node(struct mem_cgroup *root_mem)
+mem_cgroup_get_next_node(struct mem_cgroup *root_mem)
 {
 	struct cgroup *cgroup;
-	struct mem_cgroup *ret;
+	struct mem_cgroup *orig, *next;
 	bool obsolete;
 
-	obsolete = mem_cgroup_is_obsolete(root_mem->last_scanned_child);
-
 	/*
 	 * Scan all children under the mem_cgroup mem
 	 */
 	mutex_lock(&mem_cgroup_subsys.hierarchy_mutex);
+
+	orig = root_mem->last_scanned_child;
+	obsolete = mem_cgroup_is_obsolete(orig);
+
 	if (list_empty(&root_mem->css.cgroup->children)) {
-		ret = root_mem;
+		/*
+		 * root_mem might have children before and last_scanned_child
+		 * may point to one of them. We put it later.
+		 */
+		if (orig)
+			VM_BUG_ON(!obsolete);
+		next = NULL;
 		goto done;
 	}
 
-	if (!root_mem->last_scanned_child || obsolete) {
-
-		if (obsolete && root_mem->last_scanned_child)
-			mem_cgroup_put(root_mem->last_scanned_child);
-
+	if (!orig || obsolete) {
 		cgroup = list_first_entry(&root_mem->css.cgroup->children,
 				struct cgroup, sibling);
-		ret = mem_cgroup_from_cont(cgroup);
-		mem_cgroup_get(ret);
+		next = mem_cgroup_from_cont(cgroup);
 	} else
-		ret = mem_cgroup_get_next_node(root_mem->last_scanned_child,
-						root_mem);
+		next = __mem_cgroup_get_next_node(orig, root_mem);
 
 done:
-	root_mem->last_scanned_child = ret;
+	if (next)
+		mem_cgroup_get(next);
+	root_mem->last_scanned_child = next;
+	if (orig)
+		mem_cgroup_put(orig);
 	mutex_unlock(&mem_cgroup_subsys.hierarchy_mutex);
-	return ret;
+	return (next) ? next : root_mem;
 }
 
 static bool mem_cgroup_check_under_limit(struct mem_cgroup *mem)
@@ -758,28 +773,25 @@ static int mem_cgroup_hierarchical_reclaim(struct mem_cgroup *root_mem,
 	 * but there might be left over accounting, even after children
 	 * have left.
 	 */
-	ret = try_to_free_mem_cgroup_pages(root_mem, gfp_mask, noswap,
+	ret += try_to_free_mem_cgroup_pages(root_mem, gfp_mask, noswap,
 					   get_swappiness(root_mem));
 	if (mem_cgroup_check_under_limit(root_mem))
-		return 0;
+		return 1;	/* indicate reclaim has succeeded */
 	if (!root_mem->use_hierarchy)
 		return ret;
 
-	next_mem = mem_cgroup_get_first_node(root_mem);
+	next_mem = mem_cgroup_get_next_node(root_mem);
 
 	while (next_mem != root_mem) {
 		if (mem_cgroup_is_obsolete(next_mem)) {
-			mem_cgroup_put(next_mem);
-			next_mem = mem_cgroup_get_first_node(root_mem);
+			next_mem = mem_cgroup_get_next_node(root_mem);
 			continue;
 		}
-		ret = try_to_free_mem_cgroup_pages(next_mem, gfp_mask, noswap,
+		ret += try_to_free_mem_cgroup_pages(next_mem, gfp_mask, noswap,
 						   get_swappiness(next_mem));
 		if (mem_cgroup_check_under_limit(root_mem))
-			return 0;
-		mutex_lock(&mem_cgroup_subsys.hierarchy_mutex);
-		next_mem = mem_cgroup_get_next_node(next_mem, root_mem);
-		mutex_unlock(&mem_cgroup_subsys.hierarchy_mutex);
+			return 1;	/* indicate reclaim has succeeded */
+		next_mem = mem_cgroup_get_next_node(root_mem);
 	}
 	return ret;
 }
@@ -863,6 +875,8 @@ static int __mem_cgroup_try_charge(struct mm_struct *mm,
 
 		ret = mem_cgroup_hierarchical_reclaim(mem_over_limit, gfp_mask,
 							noswap);
+		if (ret)
+			continue;
 
 		/*
 		 * try_to_free_mem_cgroup_pages() might not give us a full
@@ -979,14 +993,15 @@ static int mem_cgroup_move_account(struct page_cgroup *pc,
 	if (pc->mem_cgroup != from)
 		goto out;
 
-	css_put(&from->css);
 	res_counter_uncharge(&from->res, PAGE_SIZE);
 	mem_cgroup_charge_statistics(from, pc, false);
 	if (do_swap_account)
 		res_counter_uncharge(&from->memsw, PAGE_SIZE);
+	css_put(&from->css);
+
+	css_get(&to->css);
 	pc->mem_cgroup = to;
 	mem_cgroup_charge_statistics(to, pc, true);
-	css_get(&to->css);
 	ret = 0;
 out:
 	unlock_page_cgroup(pc);
@@ -1019,8 +1034,10 @@ static int mem_cgroup_move_parent(struct page_cgroup *pc,
 	if (ret || !parent)
 		return ret;
 
-	if (!get_page_unless_zero(page))
-		return -EBUSY;
+	if (!get_page_unless_zero(page)) {
+		ret = -EBUSY;
+		goto uncharge;
+	}
 
 	ret = isolate_lru_page(page);
 
@@ -1029,19 +1046,23 @@ static int mem_cgroup_move_parent(struct page_cgroup *pc,
 
 	ret = mem_cgroup_move_account(pc, child, parent);
 
-	/* drop extra refcnt by try_charge() (move_account increment one) */
-	css_put(&parent->css);
 	putback_lru_page(page);
 	if (!ret) {
 		put_page(page);
+		/* drop extra refcnt by try_charge() */
+		css_put(&parent->css);
 		return 0;
 	}
-	/* uncharge if move fails */
+
 cancel:
+	put_page(page);
+uncharge:
+	/* drop extra refcnt by try_charge() */
+	css_put(&parent->css);
+	/* uncharge if move fails */
 	res_counter_uncharge(&parent->res, PAGE_SIZE);
 	if (do_swap_account)
 		res_counter_uncharge(&parent->memsw, PAGE_SIZE);
-	put_page(page);
 	return ret;
 }
 
@@ -1971,6 +1992,7 @@ static int mem_cgroup_swappiness_write(struct cgroup *cgrp, struct cftype *cft,
 {
 	struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
 	struct mem_cgroup *parent;
+
 	if (val > 100)
 		return -EINVAL;
 
@@ -1978,15 +2000,22 @@ static int mem_cgroup_swappiness_write(struct cgroup *cgrp, struct cftype *cft,
 		return -EINVAL;
 
 	parent = mem_cgroup_from_cont(cgrp->parent);
+
+	cgroup_lock();
+
 	/* If under hierarchy, only empty-root can set this value */
 	if ((parent->use_hierarchy) ||
-	    (memcg->use_hierarchy && !list_empty(&cgrp->children)))
+	    (memcg->use_hierarchy && !list_empty(&cgrp->children))) {
+		cgroup_unlock();
 		return -EINVAL;
+	}
 
 	spin_lock(&memcg->reclaim_param_lock);
 	memcg->swappiness = val;
 	spin_unlock(&memcg->reclaim_param_lock);
 
+	cgroup_unlock();
+
 	return 0;
 }
 
@@ -2181,7 +2210,7 @@ static void __init enable_swap_cgroup(void)
 }
 #endif
 
-static struct cgroup_subsys_state *
+static struct cgroup_subsys_state * __ref
 mem_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont)
 {
 	struct mem_cgroup *mem, *parent;
@@ -2232,7 +2261,14 @@ static void mem_cgroup_pre_destroy(struct cgroup_subsys *ss,
 static void mem_cgroup_destroy(struct cgroup_subsys *ss,
 				struct cgroup *cont)
 {
-	mem_cgroup_put(mem_cgroup_from_cont(cont));
+	struct mem_cgroup *mem = mem_cgroup_from_cont(cont);
+	struct mem_cgroup *last_scanned_child = mem->last_scanned_child;
+
+	if (last_scanned_child) {
+		VM_BUG_ON(!mem_cgroup_is_obsolete(last_scanned_child));
+		mem_cgroup_put(last_scanned_child);
+	}
+	mem_cgroup_put(mem);
 }
 
 static int mem_cgroup_populate(struct cgroup_subsys *ss,
diff --git a/mm/memory.c b/mm/memory.c
index e009ce8..22bfa7a 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1511,6 +1511,7 @@ int vm_insert_pfn(struct vm_area_struct *vma, unsigned long addr,
 			unsigned long pfn)
 {
 	int ret;
+	pgprot_t pgprot = vma->vm_page_prot;
 	/*
 	 * Technically, architectures with pte_special can avoid all these
 	 * restrictions (same for remap_pfn_range).  However we would like
@@ -1525,10 +1526,10 @@ int vm_insert_pfn(struct vm_area_struct *vma, unsigned long addr,
 
 	if (addr < vma->vm_start || addr >= vma->vm_end)
 		return -EFAULT;
-	if (track_pfn_vma_new(vma, vma->vm_page_prot, pfn, PAGE_SIZE))
+	if (track_pfn_vma_new(vma, &pgprot, pfn, PAGE_SIZE))
 		return -EINVAL;
 
-	ret = insert_pfn(vma, addr, pfn, vma->vm_page_prot);
+	ret = insert_pfn(vma, addr, pfn, pgprot);
 
 	if (ret)
 		untrack_pfn_vma(vma, pfn, PAGE_SIZE);
@@ -1671,9 +1672,15 @@ int remap_pfn_range(struct vm_area_struct *vma, unsigned long addr,
 
 	vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP;
 
-	err = track_pfn_vma_new(vma, prot, pfn, PAGE_ALIGN(size));
-	if (err)
+	err = track_pfn_vma_new(vma, &prot, pfn, PAGE_ALIGN(size));
+	if (err) {
+		/*
+		 * To indicate that track_pfn related cleanup is not
+		 * needed from higher level routine calling unmap_vmas
+		 */
+		vma->vm_flags &= ~(VM_IO | VM_RESERVED | VM_PFNMAP);
 		return -EINVAL;
+	}
 
 	BUG_ON(addr >= end);
 	pfn -= addr >> PAGE_SHIFT;
@@ -3165,6 +3172,15 @@ void print_vma_addr(char *prefix, unsigned long ip)
 #ifdef CONFIG_PROVE_LOCKING
 void might_fault(void)
 {
+	/*
+	 * Some code (nfs/sunrpc) uses socket ops on kernel memory while
+	 * holding the mmap_sem, this is safe because kernel memory doesn't
+	 * get paged out, therefore we'll never actually fault, and the
+	 * below annotations will generate false positives.
+	 */
+	if (segment_eq(get_fs(), KERNEL_DS))
+		return;
+
 	might_sleep();
 	/*
 	 * it would be nicer only to annotate paths which are not under
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index e412ffa..3eb4a6f 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1068,10 +1068,9 @@ static int copy_nodes_to_user(unsigned long __user *mask, unsigned long maxnode,
 	return copy_to_user(mask, nodes_addr(*nodes), copy) ? -EFAULT : 0;
 }
 
-asmlinkage long sys_mbind(unsigned long start, unsigned long len,
-			unsigned long mode,
-			unsigned long __user *nmask, unsigned long maxnode,
-			unsigned flags)
+SYSCALL_DEFINE6(mbind, unsigned long, start, unsigned long, len,
+		unsigned long, mode, unsigned long __user *, nmask,
+		unsigned long, maxnode, unsigned, flags)
 {
 	nodemask_t nodes;
 	int err;
@@ -1091,8 +1090,8 @@ asmlinkage long sys_mbind(unsigned long start, unsigned long len,
 }
 
 /* Set the process memory policy */
-asmlinkage long sys_set_mempolicy(int mode, unsigned long __user *nmask,
-		unsigned long maxnode)
+SYSCALL_DEFINE3(set_mempolicy, int, mode, unsigned long __user *, nmask,
+		unsigned long, maxnode)
 {
 	int err;
 	nodemask_t nodes;
@@ -1110,9 +1109,9 @@ asmlinkage long sys_set_mempolicy(int mode, unsigned long __user *nmask,
 	return do_set_mempolicy(mode, flags, &nodes);
 }
 
-asmlinkage long sys_migrate_pages(pid_t pid, unsigned long maxnode,
-		const unsigned long __user *old_nodes,
-		const unsigned long __user *new_nodes)
+SYSCALL_DEFINE4(migrate_pages, pid_t, pid, unsigned long, maxnode,
+		const unsigned long __user *, old_nodes,
+		const unsigned long __user *, new_nodes)
 {
 	const struct cred *cred = current_cred(), *tcred;
 	struct mm_struct *mm;
@@ -1185,10 +1184,9 @@ out:
 
 
 /* Retrieve NUMA policy */
-asmlinkage long sys_get_mempolicy(int __user *policy,
-				unsigned long __user *nmask,
-				unsigned long maxnode,
-				unsigned long addr, unsigned long flags)
+SYSCALL_DEFINE5(get_mempolicy, int __user *, policy,
+		unsigned long __user *, nmask, unsigned long, maxnode,
+		unsigned long, addr, unsigned long, flags)
 {
 	int err;
 	int uninitialized_var(pval);
diff --git a/mm/migrate.c b/mm/migrate.c
index a30ea5f..2bb4e1d 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1055,10 +1055,10 @@ out:
  * Move a list of pages in the address space of the currently executing
  * process.
  */
-asmlinkage long sys_move_pages(pid_t pid, unsigned long nr_pages,
-			const void __user * __user *pages,
-			const int __user *nodes,
-			int __user *status, int flags)
+SYSCALL_DEFINE6(move_pages, pid_t, pid, unsigned long, nr_pages,
+		const void __user * __user *, pages,
+		const int __user *, nodes,
+		int __user *, status, int, flags)
 {
 	const struct cred *cred = current_cred(), *tcred;
 	struct task_struct *task;
diff --git a/mm/mincore.c b/mm/mincore.c
index 5178800..8cb508f 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -177,8 +177,8 @@ none_mapped:
  *		mapped
  *  -EAGAIN - A kernel resource was temporarily unavailable.
  */
-asmlinkage long sys_mincore(unsigned long start, size_t len,
-	unsigned char __user * vec)
+SYSCALL_DEFINE3(mincore, unsigned long, start, size_t, len,
+		unsigned char __user *, vec)
 {
 	long retval;
 	unsigned long pages;
diff --git a/mm/mlock.c b/mm/mlock.c
index e125156..2904a34 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -530,7 +530,7 @@ static int do_mlock(unsigned long start, size_t len, int on)
 	return error;
 }
 
-asmlinkage long sys_mlock(unsigned long start, size_t len)
+SYSCALL_DEFINE2(mlock, unsigned long, start, size_t, len)
 {
 	unsigned long locked;
 	unsigned long lock_limit;
@@ -558,7 +558,7 @@ asmlinkage long sys_mlock(unsigned long start, size_t len)
 	return error;
 }
 
-asmlinkage long sys_munlock(unsigned long start, size_t len)
+SYSCALL_DEFINE2(munlock, unsigned long, start, size_t, len)
 {
 	int ret;
 
@@ -595,7 +595,7 @@ out:
 	return 0;
 }
 
-asmlinkage long sys_mlockall(int flags)
+SYSCALL_DEFINE1(mlockall, int, flags)
 {
 	unsigned long lock_limit;
 	int ret = -EINVAL;
@@ -623,7 +623,7 @@ out:
 	return ret;
 }
 
-asmlinkage long sys_munlockall(void)
+SYSCALL_DEFINE0(munlockall)
 {
 	int ret;
 
diff --git a/mm/mmap.c b/mm/mmap.c
index 7496231..8d95902 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -245,7 +245,7 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma)
 	return next;
 }
 
-asmlinkage unsigned long sys_brk(unsigned long brk)
+SYSCALL_DEFINE1(brk, unsigned long, brk)
 {
 	unsigned long rlim, retval;
 	unsigned long newbrk, oldbrk;
@@ -1948,7 +1948,7 @@ int do_munmap(struct mm_struct *mm, unsigned long start, size_t len)
 
 EXPORT_SYMBOL(do_munmap);
 
-asmlinkage long sys_munmap(unsigned long addr, size_t len)
+SYSCALL_DEFINE2(munmap, unsigned long, addr, size_t, len)
 {
 	int ret;
 	struct mm_struct *mm = current->mm;
diff --git a/mm/mprotect.c b/mm/mprotect.c
index d0f6e7c..abe2694 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -217,8 +217,8 @@ fail:
 	return error;
 }
 
-asmlinkage long
-sys_mprotect(unsigned long start, size_t len, unsigned long prot)
+SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len,
+		unsigned long, prot)
 {
 	unsigned long vm_flags, nstart, end, tmp, reqprot;
 	struct vm_area_struct *vma, *prev;
diff --git a/mm/mremap.c b/mm/mremap.c
index 646de95..a39b7b9 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -420,9 +420,9 @@ out_nc:
 	return ret;
 }
 
-asmlinkage unsigned long sys_mremap(unsigned long addr,
-	unsigned long old_len, unsigned long new_len,
-	unsigned long flags, unsigned long new_addr)
+SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len,
+		unsigned long, new_len, unsigned long, flags,
+		unsigned long, new_addr)
 {
 	unsigned long ret;
 
diff --git a/mm/msync.c b/mm/msync.c
index 07dae08..4083209 100644
--- a/mm/msync.c
+++ b/mm/msync.c
@@ -28,7 +28,7 @@
  * So by _not_ starting I/O in MS_ASYNC we provide complete flexibility to
  * applications.
  */
-asmlinkage long sys_msync(unsigned long start, size_t len, int flags)
+SYSCALL_DEFINE3(msync, unsigned long, start, size_t, len, int, flags)
 {
 	unsigned long end;
 	struct mm_struct *mm = current->mm;
diff --git a/mm/nommu.c b/mm/nommu.c
index 60ed837..8cee8c8 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -416,7 +416,7 @@ EXPORT_SYMBOL(vm_insert_page);
  *  to a regular file.  in this case, the unmapping will need
  *  to invoke file system routines that need the global lock.
  */
-asmlinkage unsigned long sys_brk(unsigned long brk)
+SYSCALL_DEFINE1(brk, unsigned long, brk)
 {
 	struct mm_struct *mm = current->mm;
 
@@ -1573,7 +1573,7 @@ erase_whole_vma:
 }
 EXPORT_SYMBOL(do_munmap);
 
-asmlinkage long sys_munmap(unsigned long addr, size_t len)
+SYSCALL_DEFINE2(munmap, unsigned long, addr, size_t, len)
 {
 	int ret;
 	struct mm_struct *mm = current->mm;
@@ -1657,10 +1657,9 @@ unsigned long do_mremap(unsigned long addr,
 }
 EXPORT_SYMBOL(do_mremap);
 
-asmlinkage
-unsigned long sys_mremap(unsigned long addr,
-			 unsigned long old_len, unsigned long new_len,
-			 unsigned long flags, unsigned long new_addr)
+SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len,
+		unsigned long, new_len, unsigned long, flags,
+		unsigned long, new_addr)
 {
 	unsigned long ret;
 
diff --git a/mm/swapfile.c b/mm/swapfile.c
index da422c4..f48b831 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1377,7 +1377,7 @@ out:
 	return ret;
 }
 
-asmlinkage long sys_swapoff(const char __user * specialfile)
+SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
 {
 	struct swap_info_struct * p = NULL;
 	unsigned short *swap_map;
@@ -1633,7 +1633,7 @@ late_initcall(max_swapfiles_check);
  *
  * The swapon system call
  */
-asmlinkage long sys_swapon(const char __user * specialfile, int swap_flags)
+SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
 {
 	struct swap_info_struct * p;
 	char *name = NULL;
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index c5db9a7..75f49d3 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -14,7 +14,6 @@
 #include <linux/highmem.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
-#include <linux/mutex.h>
 #include <linux/interrupt.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
@@ -24,6 +23,7 @@
 #include <linux/rbtree.h>
 #include <linux/radix-tree.h>
 #include <linux/rcupdate.h>
+#include <linux/bootmem.h>
 
 #include <asm/atomic.h>
 #include <asm/uaccess.h>
@@ -495,7 +495,7 @@ static atomic_t vmap_lazy_nr = ATOMIC_INIT(0);
 static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end,
 					int sync, int force_flush)
 {
-	static DEFINE_MUTEX(purge_lock);
+	static DEFINE_SPINLOCK(purge_lock);
 	LIST_HEAD(valist);
 	struct vmap_area *va;
 	int nr = 0;
@@ -506,10 +506,10 @@ static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end,
 	 * the case that isn't actually used at the moment anyway.
 	 */
 	if (!sync && !force_flush) {
-		if (!mutex_trylock(&purge_lock))
+		if (!spin_trylock(&purge_lock))
 			return;
 	} else
-		mutex_lock(&purge_lock);
+		spin_lock(&purge_lock);
 
 	rcu_read_lock();
 	list_for_each_entry_rcu(va, &vmap_area_list, list) {
@@ -541,7 +541,7 @@ static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end,
 			__free_vmap_area(va);
 		spin_unlock(&vmap_area_lock);
 	}
-	mutex_unlock(&purge_lock);
+	spin_unlock(&purge_lock);
 }
 
 /*
@@ -984,6 +984,8 @@ EXPORT_SYMBOL(vm_map_ram);
 
 void __init vmalloc_init(void)
 {
+	struct vmap_area *va;
+	struct vm_struct *tmp;
 	int i;
 
 	for_each_possible_cpu(i) {
@@ -996,6 +998,14 @@ void __init vmalloc_init(void)
 		vbq->nr_dirty = 0;
 	}
 
+	/* Import existing vmlist entries. */
+	for (tmp = vmlist; tmp; tmp = tmp->next) {
+		va = alloc_bootmem(sizeof(struct vmap_area));
+		va->flags = tmp->flags | VM_VM_AREA;
+		va->va_start = (unsigned long)tmp->addr;
+		va->va_end = va->va_start + tmp->size;
+		__insert_vmap_area(va);
+	}
 	vmap_initialized = true;
 }